/**
 * Thread-safe in-memory cache service
 */
export declare class Cache {
    private store;
    /**
     * Set a value in the cache
     */
    set<T>(key: string, value: T, ttlSeconds?: number): void;
    /**
     * Get a value from the cache
     */
    get<T>(key: string): T | null;
    /**
     * Check if a key exists in the cache
     */
    has(key: string): boolean;
    /**
     * Delete a key from the cache
     */
    delete(key: string): void;
    /**
     * Clear all cache entries
     */
    clear(): void;
    /**
     * Get or set a value (lazy loading)
     */
    getOrSet<T>(key: string, factory: () => Promise<T>, ttlSeconds?: number): Promise<T>;
    /**
     * Get cache statistics
     */
    stats(): {
        size: number;
        keys: string[];
    };
    /**
     * Clean up expired entries
     */
    cleanup(): number;
}
declare const globalCache: Cache;
export { globalCache };
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